比如我要修改SQL_TEXT=’8.0.0.0.0’为’9.0.0.0.0′
SQL> select rowid, 2 dbms_rowid.rowid_relative_fno(rowid)rel_fno, 3 dbms_rowid.rowid_block_number(rowid)blockno, 4 dbms_rowid.rowid_row_number(rowid) rowno, 5 a.* 6 from bootstrap$ a where rownum<2; ROWID REL_FNO BLOCKNO ROWNO LINE# OBJ# SQL_TEXT ------------------ ------- ---------- ------ --------- ----- ----------- AAAAA4AABAAAAF6AAA 1 378 0 -1 -1 8.0.0.0.0
一般使用bbed，都是将一些配置信息写入到一个参数文本里，在调用bbed时，指定该参数文件。如：
$bbed parfile=bbed.par
先获取datafile 的信息
将datafile 的信息写入一个文件，格式为：文件编号 文件名字 文件大小。可以通过如下SQL 获取：
SQL>select file#||' '||name||' '||bytes from v$datafile ; FILE#||''||NAME||''||BYTES ------------------------------------------------------------------------------ 1 /u01/app/oracle/oradata/jytest/system01.dbf 524288000 2 /u01/app/oracle/oradata/jytest/undotbs01.dbf 193986560 3 /u01/app/oracle/oradata/jytest/sysaux01.dbf 2149580800 4 /u01/app/oracle/oradata/jytest/users01.dbf 5242880 5 /u01/app/oracle/oradata/jytest/hygeia.dbf 21474836480
注意这里的file id。 我们这里的file id 和 oracle 系统内部的file id 相同。 当然这个id 我们也可以自己指定。 当我们在bbed 里设置file id 时，就是根据这个参数文件中的的设置来的。 最好设置为相同，不然以后可能会混淆。
将上面查询出来的datafile信息保存到文本里。
[oracle@weblogic28 lib]$ cat /u01/filelist.txt 1 /u01/app/oracle/oradata/jytest/system01.dbf 524288000 2 /u01/app/oracle/oradata/jytest/undotbs01.dbf 193986560 3 /u01/app/oracle/oradata/jytest/sysaux01.dbf 2149580800 4 /u01/app/oracle/oradata/jytest/users01.dbf 5242880 5 /u01/app/oracle/oradata/jytest/hygeia.dbf 21474836480
创建parameter file：
[oracle@weblogic28 lib]$ cat /u01/bbed.par blocksize=8192 listfile=/u01/filelist.txt mode=edit
使用parameter file 连接bbed：
[oracle@weblogic28 lib]$ ./bbed parfile=/u01/bbed.par
Password:
BBED: Release 2.0.0.0.0 - Limited Production on Wed Oct 31 14:39:28 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
************* !!! For Oracle Internal Use only !!! ***************
BBED> set dba 1,378 offset 0
DBA 0x0040017a (4194682 1,378)
OFFSET 0
find 在指定的block中查找指定的字符串，结果是显示出字符串，及其偏移量–offset，偏移量就是在block中的字节数
查找关键字8.0.0.0.0，确定其在block中的偏移量offset。
BBED> find /c 8.0.0.0.0 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8181 to 8191 Dba:0x0040017a ------------------------------------------------------------------------ 302e302e 302e3001 065d01 <32 bytes per line>
dump 查看具体内容：
BBED> dump /v dba 1,378 offset 8181 count 11 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8181 to 8191 Dba:0x0040017a ------------------------------------------------------- 302e302e 302e3001 065d01 l 0.0.0.0..]. <16 bytes per line>
从上面看到’8.’这两个字节没显示出来所示8.0.0.0.0的偏移量是从8179开始
count是指查看多少个字节的内容
BBED> dump /v dba 1,378 offset 8179 count 11 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8179 to 8189 Dba:0x0040017a ------------------------------------------------------- 382e302e 302e302e 300106 l 8.0.0.0.0.. <16 bytes per line>
modify 修改指定block的指定偏移量的值，可以在线修改。
由上可知偏移量8179就是’8’现将8修改成9
BBED> modify /c '9' dba 1,378 offset 8179 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8179 to 8189 Dba:0x0040017a ------------------------------------------------------------------------ 392e302e 302e302e 300106 <32 bytes per line> BBED> dump /v dba 1,378 offset 8179 count 11 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8179 to 8189 Dba:0x0040017a ------------------------------------------------------- 392e302e 302e302e 300106 l 9.0.0.0.0.. <16 bytes per line>
应用变更
BBED> sum dba 1,378 Check value for File 1, Block 378: current = 0x13d5, required = 0x12d5 此时 current checksum 是0x13d5，requiredchecksum 是0x12d5 BBED> sum dba 1,378 apply Check value for File 1, Block 378: current = 0x12d5, required = 0x12d5
加上apply参数，使checksum一致。即之前的修改生效。
这时关闭数据库后打开数据库报错
SQL> startup ORACLE instance started. Total System Global Area 6442450944 bytes Fixed Size 2030368 bytes Variable Size 1090520288 bytes Database Buffers 5335154688 bytes Redo Buffers 14745600 bytes Database mounted. ORA-01092: ORACLE instance terminated. Disconnection forced
错误信息如下(alertsid.log)
Errors in file /u01/app/oracle/admin/jytest/udump/jytest_ora_6148.trc: ORA-00704: bootstrap process failure ORA-00702: bootstrap verison '9.0.0.0.0' inconsistent with version '8.0.0.0.0' Wed Oct 31 14:46:52 2012 Error 704 happened during db open, shutting down database USER: terminating instance due to error 704 Instance terminated by USER, pid = 6148 ORA-1092 signalled during: ALTER DATABASE OPEN... bootstrap verison '9.0.0.0.0' inconsistent with version '8.0.0.0.0'
说明原来的值是’8.0.0.0.0’现在却是’9.0.0.0.0’所以数据库打不开
现在又将8.0.0.0.0修改成9.0.0.0.0
BBED> modify /c '8' dba 1,378 offset 8179 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8179 to 8189 Dba:0x0040017a ------------------------------------------------------------------------ 382e302e 302e302e 300106 <32 bytes per line> BBED> dump /v dba 1,378 offset 8179 count 11 File: /u01/app/oracle/oradata/jytest/system01.dbf (1) Block: 378 Offsets: 8179 to 8189 Dba:0x0040017a ------------------------------------------------------- 382e302e 302e302e 300106 l 8.0.0.0.0.. <16 bytes per line> BBED> sum dba 1,378 Check value for File 1, Block 378: current = 0x12d5, required = 0x13d5 BBED> sum dba 1,378 apply Check value for File 1, Block 378: current = 0x13d5, required = 0x13d5 SQL> startup ORACLE instance started. Total System Global Area 6442450944 bytes Fixed Size 2030368 bytes Variable Size 1090520288 bytes Database Buffers 5335154688 bytes Redo Buffers 14745600 bytes Database mounted. Database opened.
当把9.0.0.0.0修改成8.0.0.0.0时数据库就能正常打开了
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